Steam-boiler furnace.



No. 707,495. Patented Aug. l9, I902.

J. R. BAILEY.

STEAM BOILER FURNACE.

(Application filed Apr. 7, 1902.\

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No. 707,495. Patented Aug. I9, I902.

' J. R. BAILEY.

STEAM BOILER FURNACE. (Application filed Apr. 7, 1902.)

(No Model.) 2 Sheets-Sheet 2.

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JOHN RICHARDSON BAILEY, OF BALTIMORE, MARYLAND, ASSIGNOR TO MAURICE LAUPHEIMER, OF BALTIMORE, MARYLAND.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 707,495, dated August 19, 1902. Application filed April '7, 1902. Serial No. 101,816. (No model.)

To all whom it may concern:

Be it known that 1, JOHN RICHARDSON BAILEY, a citizen of the United States, residing at Baltimore, State of Maryland, have invented certain new and useful Improvements in Steam-Boiler Furnaces, (Case A;) and I do hereby declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in furnaces for steam-boilers; and it is intended to provide a furnace in which the carbon of the coal will be entirely consumed into carbon dioxid, thus not only securing higher efficiency for the furnace, but also insuring such complete combustion that the furnace will be practically, if not entirely, smokeless. A great deal of the smoke passing from furnaces is occasioned by the impact of the heated gases on the cool shell of the boiler before complete combustion of the fuel has been secured, thus causing a chilling of said gases and the deposit of carbon in the solid form, which carbon not being afterward ignited is carried up the smoke-stack in the form of smoke. This is not only wasteful of the fuel, but is especially objectionable in cities,where the smoke nuisance is a crying evil.

I accomplish the desired ends by the structurethat will be hereinafter described.

Reference is had to the accompanying drawings, in which the same parts are indicated by the same letters throughout both views.

Figure 1 represents a section through the furnace along the line 1 1 of Fig. 2. Fig. 2 represents a double section, the left half being along the line 2 2 of Fig. 1 and the right half being along the line 2" 2 of Fig. 1. In this figure the boiler is shown not in section, but in end elevation.

I have shown a horizontal tubular boiler as used in connection with the furnace, the. said boiler being of a common well-known type; but any other form of boiler may be used, if desired.

Referring now to the drawings by letter, A represents the ash-pit, and B the grate, which may be of any ordinary or suitable type.

0 represents the fire-box.

The ash-pit and fire-box have doors of any suitable construction a and c.

D represents the front bridge-wall, behind which the combustion-chamberE is situated. This combustion-chamber has a floor, which is composed of two parts F and F, sloping toward each other, as at f. The pointf is underneath thed'eflector G, which is constructed like an arch, but with the bottom edge fiat, and extends between the side walls, thus spanning the space between the said walls in the furnace, and projects down below the crown h of the arch 1-1. This arch H touches the bottom of the .boiler at its apex, and the space between the boiler and the arch is walled up in front, as shown at K, to prevent the passage of part of the products of combustion above the arch H.

L is the rear bridge-wall, and M is the back connection.

N is the boiler, shown as a cylindrical tubular boiler but, as before stated, this may be of any desired type.

P is the front connection, terminating in the uptake Q.

R is a pipe perforated on its rear face to deliver steam or air into the furnace. The steam is admitted when desired for the purpose of blowing the ashes out of the hearth or for creating a forced draft when desired, and air may be admitted when the steam is not on for the purpose of promoting the combustion in the combustion-cha1nber E; but this pipe may be omitted altogether, if desired.

The products of combustion passing from the grate do not come directly in contact with the bottom of the boiler, being protected therefrom by an intermediate layer of more orless deadair, but pass into the combustionchamber E in the direction of the arrows. In this combustion chamber the direction of highly-heated gases is deflected downward by the deflector G, and their motion is arrested somewhat, while at the same time the highlyheated brick walls surrounding this combustion-chamber E prevent any chilling of the products of combustion, and the result is complete combustion of the carbon and 2. volume of smokeless and highly-heated gases which enter into the back connection M. The combustion being complete, little or no liberation of carbon occurs when the highlyheated gases enter the fire-tubes of the boiler, and as a consequence the gases escaping from the front connection P and uptake Q are practically colorless.

In the construction of the flat arch G, I preferably use fire-bricks of a large size and specially made for the purpose.

It will be obvious that various modifications might be made in the herein-described device which could be used without departing from mounted in said casing and extending over said fuel-chamber and said bridge-walls, an arch extending from the front of said front bridge-wall to the rear of said rear bridge-wall and tangent to said boiler at its highest point, a partition-Wall resting upon the front of said arch and extending up to and inclosing the lower part of said boiler, a baffle-wall extending downwardly from about the center of said arch toward the lowest part of said combustion-chamber, and a perforated air-pipe behind said front bridge-wall and adapted to supply air to the products of combustion after they have left the fuel-chamber, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN RICHARDSON BAILEY. Witnesses:

FRANK D/BLACKISTONE, FRED W. ENGLERT. 

